1 Institute of Endocrine and Metabolic Sciences, Università Vita-Salute San Raffaele, IRCCS Ospedale San Raffaele, Via Olgettina 60, 20132, Milan, Italy. giustina.andrea@hsr.it.
2 Institute of Endocrine and Metabolic Sciences, Università Vita-Salute San Raffaele, IRCCS Ospedale San Raffaele, Via Olgettina 60, 20132, Milan, Italy.
3 Department of Medical and Surgical Sciences, University of Foggia, Foggia, Italy.
4 Richmond Veterans Affairs Medical Center and Virginia Commonwealth University, Richmond, VA, USA.
5 University of Wisconsin-Madison, Madison, USA.
6 Faculty of Medicine, University of Oslo, Oslo, Norway.
7 Laboratory of Clinical and Experimental Endocrinology, Department of Chronic Diseases, Metabolism and Ageing, 3000 KU, Leuven, Belgium.
8 Molecular Endocrinology Group, Instituto de Investigacion Sanitaria (IDIS), Complejo Hospitalario Universitario de Santiago (CHUS/SERGAS). CIBER de Fisiopatologia de La Obesidad y Nutricion (CIBERobn), Instituto de Salud Carlos III, Madrid, Spain.
9 Gastroenterology and Gastrointestinal Endoscopy Unit, Vita-Salute San Raffaele University, IRCCS San Raffaele Scientific Institute, Milan, Italy.
10 Calcium Metabolism and Osteoporosis Program, American University of Beirut-Medical Center, Beirut, Lebanon.
11 Department of Human Sciences and Promotion of the Quality of Life, San Raffaele Roma Open University, Via Di Val Cannuta 247, 00166, Rome, Italy.
12 Experimental Medicine Department, Sapienza University, Rome, Italy.
13 Department of Medicine, School of Clinical Sciences, Monash University, Clayton, Australia.
14 Rheumatology Unit, University of Verona, Verona, Italy.
15 Department of Medicine, Université Laval, Quebec City, Canada.
16 Gastroenterology, Hepatology and Nutrition Division, Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy.
17 Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy.
18 Kravis Center for Clinical Cardiovascular Health at Mount Sinai Heart, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA.
19 Sapienza Rome University, Rome, Italy.
20 Service of Bone Diseases, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland.
21 Obesity and Lipodystrophy Center, University Hospital of Pisa, Pisa, Italy.
22 Department of Medicine, Medical College of Wisconsin, Milwaukee, WI, USA.
23 Vitamin D Standardization Program, Havre de Grace, MD, USA.
24 Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland.
25 Department of Medicine and Surgery, Research Unit of Endocrinology and Diabetes, Università Campus Bio-Medico di Roma, Via Alvaro del Portillo, 21 - 00128, Roma, Italy.
26 Fondazione Policlinico Universitario Campus Bio-Medico, Via Alvaro del Portillo, 200 - 00128, Roma, Italy.
27 University of California, San Francisco and the San Francisco Veterans Affairs Health Care System, San Francisco, USA.
28 Department of Medicine, Endocrinology Division, Vagelos College of Physicians and Surgeons Columbia University, New York, NY, USA.